The princess of the Amazons, Wonder Woman is one of Earth's most powerful defenders of peace and equality and a member of the Justice League. She is often considered an archetype for the comic book superheroine. Her original origin depicted her as a clay figure brought to life by the gods, but in recent years she has been depicted as the daughter of Zeus and the Amazon queen Hippolyta.

When a costume has IT, that's all it takes for a fan to wear it. If they like it and believe in it. Earlier someone mention how hard it was to do armor for a costume, but that has not stopped storm troopers for decades.

And newer fans are hindered by Linda Carter today? I wish.

People are wearing versions similar to the battle dress seen in the latest WW#1. Bit not so much the new modern version.

The New 52 WW costume was so poorly designed by Jim Lee, even he can't get the details right. A lot of it is open to artist's interpretation, that's why everyone draws the breastplate differently. It changes in every book, so which is the definitive version? Chiang's double W lightning bolts, Lee's star+WW+bird hybrid or Reis' curlyQ double W's? If the artists being paid to draw her don't know, why would Wonder Woman cosplayers?

The traditional costume is much simpler to replicate and it looks better anyway. The new one is in a constant state of flux and hasn't quite gelled yet.

You also have to take into account that cosplayers unhappy with the New 52's direction for Wonder Woman may wish to represent the version that most inspired them to dress as her in the first place.